Alexandria N. Leveille, Marissa M. Allegrezza, Kalen Laybourn and Anita E. Mattson
Chem. Commun., 2022,58, 12600-12603
DOI:
10.1039/D2CC02023H,
Communication
Benzopyrylium triflates react with sulfoxonium ylides to give rise to cyclopropanated products in up to 90% yield as a single diastereomer. The cyclopropanated products can easily undergo acid-mediated ring-expansion to afford benzo[b]oxepines. Control over the absolute stereochemistry of the process is possible when the reaction is executed under the influence of a suitable anion-binding catalyst.
